Transcription
Have you ever wondered how astronauts sip their hot coffee in zero gravity?
You see, in zero gravity, liquid sticks to itself and pretty much anything it touches. So if they used regular cups, the coffee would just stick to the sides and the bottom, and they would have to shake the cup towards their face in the hope that some of the hot liquid breaks loose and floats towards their mouth, which sounds pretty risky.
So they designed a special-shaped cup in which the fluid placed in it gracefully creeps up and parks itself right next to the lip due to capillary force and surface tension.